package com.sky.service.impl;

import com.sky.context.BaseContext;
import com.sky.dto.ShoppingCartDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.ShoppingCart;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.mapper.ShoppingCartMapper;
import com.sky.service.ShoppingCartService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;

@Service
@Slf4j
public class ShoppingCartServiceImpl implements ShoppingCartService {
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;

    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private SetmealMapper setmealMapper;
    @Override
    public void addShoppingCart(ShoppingCartDTO dto) {
        ShoppingCart shoppingCart = new ShoppingCart();
        BeanUtils.copyProperties(dto,shoppingCart);
        Long userId = BaseContext.getCurrentId();
        shoppingCart.setUserId(userId);
        List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);
        if(list!=null&&!list.isEmpty()){
            ShoppingCart cart = list.get(0);
            cart.setNumber(cart.getNumber()+1);
            shoppingCartMapper.updateNumber(cart);
        }
        else{
            Long dishid = shoppingCart.getDishId();
            if(dishid!=null){
                Dish dish = dishMapper.selectById(dishid);
                shoppingCart.setName(dish.getName());
                shoppingCart.setImage(dish.getImage());
                shoppingCart.setAmount(dish.getPrice());
                shoppingCart.setCreateTime(LocalDateTime.now());
                shoppingCart.setNumber(1);
            }
            else {
                Long setmealId = shoppingCart.getSetmealId();
                Setmeal setmeal = setmealMapper.selectById(setmealId);
                shoppingCart.setName(setmeal.getName());
                shoppingCart.setImage(setmeal.getImage());
                shoppingCart.setAmount(setmeal.getPrice());
                shoppingCart.setCreateTime(LocalDateTime.now());
                shoppingCart.setNumber(1);
            }
            shoppingCartMapper.insert(shoppingCart);
        }
    }

    @Override
    public List<ShoppingCart> showShoppingCart() {
        Long userId = BaseContext.getCurrentId();
        ShoppingCart shoppingCart =ShoppingCart.builder()
                        .id(userId)
                                .build();
        return shoppingCartMapper.list(shoppingCart);
    }

    @Override
    public void clean() {
        Long userId = BaseContext.getCurrentId();
        ShoppingCart shoppingCart =ShoppingCart.builder().id(userId).build();
        shoppingCartMapper.deleteByUserId(userId);
    }

    @Override
    public void sub(ShoppingCartDTO dto) {
        ShoppingCart shoppingCart = new ShoppingCart();
        BeanUtils.copyProperties(dto,shoppingCart);
        shoppingCart.setUserId(BaseContext.getCurrentId());
        List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);
        if(list!=null){
            shoppingCart = list.get(0);
            Integer number=shoppingCart.getNumber();
            if(number==1){
                shoppingCartMapper.deleteById(shoppingCart.getId());
            }
            else{
                shoppingCart.setNumber(shoppingCart.getNumber()-1);
                shoppingCartMapper.updateNumber(shoppingCart);
            }
        }
    }
}
